<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{margin: 0;padding: 0;}
        .box{
            width: 100;
            height: 30px;
            line-height: 30px;
            border-bottom: 3px solid #ffefef;
            display: flex;
        }
        .box ul li{
            width: 10%;
            list-style: none;
            float: left;
            text-align:center;
        }
    </style>
</head>
<body>
    <div class="box">
        <ul>
            <li>
                <a href="#">音乐</a>
            </li>
            <li>
                <a href="#">音乐</a>
            </li>
            <li>
                <a href="#">音乐</a>
            </li>
            <li>
                <a href="#">音乐</a>
            </li>
            <li>
                <a href="#">音乐</a>
            </li>
            <li>
                <a href="#">音乐</a>
            </li>

            <li>
                <a href="#">音乐</a>
            </li>
            <li>
                <a href="#">音乐</a>
            </li>
        </ul>
    </div>
</body>
</html>